Introduced in 2020, the DS920+ offers you four hard drive bays. Computing power is abundant, Synology uses a 4-core processor and 4GB of RAM. The software support including all security updates should be around ten years, as Synology usually does. The model can also be upgraded with SSDs for caching data transfers before writing to the hard drives.
Unfortunately, like almost all Synology NAS, this model does not offer a modern 10 Gbps port, whether RJ45 or SFP+. So you will have to settle for about 120MB/s transfer speed or do port aggregation.